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comma on PLASTIC Examiner UNITED STATES PATENT OFFICE.

RICHARD LEMARE, OF NEW YORK, N. Y.

IMPROVEMENT IN ARTIFICIAL STONE.

Specification forming part of Letters Patent No. 136,604, dated March 11,1873.

To all whom it may concern: take four measured parts of as-retort breeze,

Be it known that I, RICHARD LEMARE, of clean washed and allowed to dry; tlien )ou nd New York city, county of New York, and State these together while dry; add water, an mix of New York, have invented a certain Oompoto Heaths-13mmeyo'f "mortar.

sition for lIIanuf-acturing an Improved Artifi- This composition, when set hard, is found cial Stone, of which the following is a specifito contain greater hydraulic propertles, and fication. is more ductile, and has a less tendency to The nature of the said invention consists in split, than cement and ordinary sand; theresnbstltut-lng a material known as as-house fore is more adapted for the purposes set forth.

dust or gas-retort hreeze, instead 0 san or I claimshingle, as used 111 the manufacture of artifi- A composition of the above-mentioned macial stone at this present time, forlaying down terials, to wit, hydraulic cement and gas-residewalks and floors, for covering roofs, and tort breeze or dust.

for architectural castings, such as chimney-- RICHARD LEMARE.

caps, &c.

To prepare the composition, take of hFdrau- Witnesses:

lie or Portland cement one measure p31 JAMES WALKER, spreading it on a Board dry) to cool; then HOWARD HENRY WILLIAMS. 

